Piston Ring End Gap
WARNING: This page is about a different car, the 2019 Nissan NV3500 HD, 2019 Nissan NV2500 HD, and 2019 Nissan NV1500. However, it is still accessible from the selected car via links, so may be relevant.
- Make sure that the cylinder bore inner diameter is within the specification. Follow the "Cylinder Bore Inner Diameter" procedure.
- Lubricate piston and ring with new engine oil. Then insert piston and ring into the bore until it is in the middle of cylinder. And then measure the piston ring end gap with a feeler gauge.
Standard:
Top ring
: 0.23 - 0.33 mm (0.0091 - 0.0130 in)
2nd ring
: 0.33 - 0.48 mm (0.0130 - 0.0189 in)
Oil ring
: 0.20 - 0.50 mm (0.0079 - 0.0197 in)
Limit:
Top ring
: 0.56 mm (0.0220 in)
2nd ring
: 0.68 mm (0.0268 in)
Oil ring
: 0.85 mm (0.0335 in)
- If the measured value exceeds the limit, replace piston ring, and measure again.